21251590

素因数分解:

$2^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{4079}}^1$

素因数の和:4607

約数の個数: 16

約数和(自身を含む): 38335680

約数和(自身を除く): 17084090

約数列:

[1, 2, 5, 10, 521, 1042, 2605, 4079, 5210, 8158, 20395, 40790, 2125159, 4250318, 10625795, 21251590]

約数ペア:

[(1, 21251590), (2, 10625795), (5, 4250318), (10, 2125159), (521, 40790), (1042, 20395), (2605, 8158), (4079, 5210)]